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TENSIONING DEVICE FOR LOOMS.

, APPLICATION FILED AUG-10. L918.

7 1,308,121, Patented July 1, 1919.

a SHEETS-SHEET A. SOCCID.

TE NS!ONI N G DEVICE FOR LOOMS. APPLICATION FILED AUG- 10. I918.

1,398, 1 2 1 Patnted July 1, 1919.

3 SHEETS-r-SHEEI 2.

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THB COLUMBIA PLANOORAPH c0., WASHINGTON, D. c-

SOCCIO. Tmsptmms DEVICE FOR LOOMS.

- APPLICATION FILED AUG-10,1918.

Patented July 1, 1919.

3 SHEETS-SHEET 3.

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fig 1 UNITED STATES PATENT OFFICE.

TENSIONING DEVICE FOR LOOMS.

Specification of Letters Patent.

Patented July 1, 1919.

Application filed August 10, 1918. Serial No. 249,248.

devices for catch cords used in the manufacr ture of fabrics.

Catch cords, which are usually stronger and heavier than the weft and warp threads, are threaded through the loops of the weft threads at each side of silk fabrics during the weaving operation so as to; strengthen the edges of the selvages. It is now usual, in order to regulate the tension ofthe catch cords as they are drawn off of the bobbins or spools to wind about one end of the spool a rope fixed at one end and having upon its free end a number of weights, the.

number of weights being varied so as to obtainthe proper braking action between the spool and rope. This typeof tensioning device is open to the objection thatthe tension under which the cord is drawn from the spool is difficult to regulate and the cords are not drawn 01f in a smooth and even mannor, the result being that the edges of the fabric are faulty or imperfect, in that they. are rough and uneven. The ropes, since the" spools rotate within the convolutions of the ropes wound thereabout, are SUbJBCt to GX- cessive wear and frequent changes of the ropes are necessary. The ropes give a very disorderly appearance to the'loom; the rods become tangled; and considerable time and expense are wasted in replenishing and changing the spools when they have become empty.

The present invention has as its object to overcome the disadvantages inherent in the tensioning devices heretofore used,-and. to this end my invention comprlses an imsimple and compact in construction and neat in appearance.

The above and other objects of my inven-- tion are obtained. in the structure described in the following specification and illustrated in the accompanying drawings, and wherel much of theloom as is necessary to illustrate my improved tensioning device applied thereto. 7

Fig. 2is a fragmentary view of a portion ofthe loom shown in Fig. 1. a

Fig. 3 is a side elevational view of my improved tensioning device. i

Fig. 4 is a bottom plan view thereof. Fig. 5 is a sectional view taken substantially on line 5-5 of Fig. 3.

Fig. dis a sectional view taken on line 6-6 of Fig. 3.

Fig. 7 is a sectional view taken on line 77 of Fig. 4:.

Fig. 8 is a sectional view taken 011 line 88 of Fig. 4.

In thedrawings, like reference characters indicate likepartsinthe several views. In order to clearly illustrate the application of myinvention, I have shown in a conventional manner in Figs. 1 and 2 a loom having a frame 10, a warp beam 11, from which the warp threads 12 are unwound, a roller 13, over which the warp threads pass to the heddles 14, a lay 15 which beats the wefts in place and carries the usual shuttle 16, and a cloth beam 17 on to which the woven fabric is wound. It is of course obvious that the loom shown in the drawings is disclosed for illustrative purposes only, and my invention maybe employed in combination with looms oft-ypes other that that illustrated. My improved tensioning device, designated generally by the letter A in Figs. 1 and 2 @maybe mounted on the loom in any desired manner andin any preferred position, but by way of illustration it is shown as being mounted upon one end of the rod 18 extending horizontally above and somewhat to the rear of the guide roller 13. The arm 18 is removably carried by a block 19 which is adjustably secured to a bracket 20 carried by the frame 10. The'bracket 20' is adjustable longitudinally of the frame by means of a bolt and slot arrangement 21, and

Figure 1 isa side elevational'view of so the bracket 20 is vertically slotted,at at 22, to

permit the block 19 to be adjusted vertically thereon. The fixed end of the arm 18 is bent at right angles to the body portion thereof, so as to engage in a recess in the top of the block 19, and the arm is locked in place by a set screw 23. It will be noted that with the supporting means above described the tensioning device A may be adjusted vertically and horizontally so that it may be given the correct position relative to the guide roll 13, and if it is desired to remove the tensioning device together with the supporting rod 18, this may be done by merely unscrewing'the set screw 23.

My improved tensioning device A has a body portion comprising preferably a block of wood 24, to the under surface of which is secured a bracket 25 constructed of a strip of metal bent to the form of a loop which receives the rod 18 to lock the bracket in adjusted position on the arm 18, a bolt is-passed through the ends of the loop and this bolt carries a thumb nut 26 whereby the ends of the loop are drawn toward each other. Extending horizontally from one end of the block 24 is a spool supporting bracket 27 which is curved laterally andthis bracket has two spaced apart depending cylindrical projections 28 which form bearings for the spool spindles. The opening through'each of the projections 28 is of increased diameter at its upper end so as to form an upwardly facing internal shoulder 29, as shown in Fig. 7

Each of the spool spindles has a centrally apertured disk 30 upon which the catch cord spool131 rests, and depending from the disk 30 isa sleeve 32', rotatably fittingin the enlarged portion of the opening in the bearing 28. The sleeve 32 has a through opening and an internal shoulder, and extending through this opening is a locking pin 33 having a head engaging said shoulder. The locking pin 33 extends through the reduced portion of the bearing 28 to a point below the bearing and the protecting end of this pin receives a cotter pin 34 to lock the pin 33in place. If" desired, a washer 35 may be interposed between the cotter pin 34 and the end of the cylindrical projections 28.

Interposed between the Y upwardly facing shoulder '29 and the inner edge of the sleeve 32 is a spring 36. The aperture of'the disk 30 isthreaded so as to receive the threaded end ofrthe spool pin 37 which extends into the opening of the spool '31 when the spool has been placed on the spindle. To prevent relative rotation between the spool 31 and the pin 37, the pin has a spring tongue 38 which is soarranged as to frictionally engage and press against the walls of the opening in the spool 31.

With the construction for mounting the spool just described, it'will be noted that the spring 36 exerts a braking action which prevents the spool from running free, and thus the tension of the catch cord is to a certain extent regulated. There can be no slack in the catch cords between the spools 31 and the hereinafter described tension disks and rollers, and therefore the threads are'not given a sudden jerk while being unwound from the spools, as would be the case if slack were permitted.

The number of catch cords spools or bobbins may be varied, as desired, and the spools may be arranged in any suitable manner, it being only suiiicient that they be so spaced that the catch cords will not interfere with each other. In some instances two catch cords will be suflicient to make a proper edge upon the fabric, but to permit three catch cords to be used in event of this number being necessary, I provide a third spool spindle which carries the spool 31. Secured to the laterally extending part of the spool supporting bracket 27 is a block 39 having two spaced apart through openings 40 which receive the strip 41, carrying at its outer end a spindle bearing 28 which is somewhat similar to the spindle bearing 28 above described. If desired, the spindle and bearing for the spool 31 may be similar to that shown in Fig. 7, but in Fig. 8 I have shown a slightly modified construction, in that the disk 31 has a depending stem 42 extending through the bearing 28 and locked in place by a cotter pin 34. Between the disk 30 and the upwardly facing shoulder 29 of the bearing 28 is a coiled spring 36 which exerts the proper braking action upon the spindle. The finger 41 may be positioned in either one of the openings 40 of the block 39, and for the purpose of locking this finger in adjusted position, the finger has a notch 43 and the block carries a pivoted latch 44, which, when in closed position fits in the notch 43 of the finger.

The cord tensioning disks and rollers hereinafter described more in detail are carried by rods 45 which may be disposed as desired, but in the present instance two of these rods are shown as passing transversely through the body portion or block 24, and the third rod passes through a short block 46 secured to the upper surface and at one end of the block 24. The rods or shafts 45 are maintained against rotation by means of screws 47 and are threaded at their outer ends. Mounted upon each end of one of the shafts or rods 45, preferably the one which is centrally disposed, is a tensioning roller 48, most clearly shown in Fig. 5, and on each side of each roller 48 and carried: by the shaft 45 is a friction sleeve 49, one of said sleeves being fixed against rotation by means of a set screw 50, and the'other sleeve,

preferably the enter one, being maintained against rotation by a key and slot arrange ment 51. Between the opposing faces or surpair of friction disks 55, the opposing faces of each pair of disks being heldin frictional engagement by means of a coiled spring 56,

the tension of which is regulated "by the nut 57. The disks 55 are not locked to the rod 45, but they are held against free rotation by meansof springs 56, and if desired,.a spring 58 may be interposed between .the inner disk of each pair and the block 24. i

For thepurpose of guiding the catch cords from the spools 31 to the friction disks 55,

suitable eyes 59 carried by the block 24 are provided. j j The numeral 60 designates a strip .POSltioned above thebody portion 24 and secured at its rear end to the top of the block 46 and supported at its forward end by the standards 61. This strip 60 is provided soas to,

limit the upward movement of thetake up wires 62 which wires are secured at their in ner ends to the block 46 and flex in the space between the block 24 and the strip 50. The wires 62 guide hooks 63 through which the catch cords, designated by numeral 64 are threaded. At each side of and adjacent the forward end of the block 24 is an eye 65, and

projecting forwardly from the front end of.

the block is a pair of eyes 66.

The manner of pressing the catch cords over the tensioning devices is clearly illustrated in Figs. 3 and 4. In these figures, the catch cords from the spools 31 carried directly by the spool supporting bracket 27 are both threaded through the eyes and tensioning devices on one side of the body portion, and the catch cord of the spool 31 is passed through the eyes and tensioning devices on the other side of the body portion 24. From Fig. 3 will be seen that the catch cords 64 are first threaded through the eye 59, passed between the friction disks 55 on the rod 45 passing through the block 46, wrapped about the tensioning roller 48, passed between the tensioning disks 55 at the forward end of the body portion 24, and are threaded through the eye 65, the guide hook 63 of the take-up wire 62 and thence through the eye 66 projecting from the forward end of the block 24. The rollers 48 and the disks 55 are angularly disposed relative to each other in the manner illustrated so as to insure that the cords 64 are maintained between the disks 55 and within the peripheral grooves of the rollers 48. It will be seen that at no time can the catch cord become loose or slack. The

spindles'npon Which the rollers 31 and 31 are mounted are always subjected to a braking action, due tothe springs 36. The tension under which the threads are drawn from the tensioning device may be readily regulated by means of the nuts 54 and 57. The take-up wires 62 prevent the catch cords from being suddenly jerked when the loom is started, for by means of these wires, when the cords are initially placed under strain, theiwires will flex downwardly, thus absorbingthe shock to a certain extent, and then after the cords are in motion these take-up wires will take up any slack between the tensioning disks 55 and the heddles 14. When a spool becomes empty a fresh spool can be substituted in its place and the catch cords be readily threaded through the eyes and the tensioning device, and the catch cords can at no time become: entangled.

I Itis, of course, obvious that my invention is susceptible to various modifications and changes which would be within the spirit of the invention without departing from the scope of the following. claims. 1

.VVhat I claim is 1.. The combination with a loom provided with means for supporting spools, on which .catch cords are wound, of spring actuated means arranged intermediate of the spool support, and the warp thread guide roll of the loom for subjecting the catch cords to a uniform tension.

2. The combinationwith a loom, of a tension means for a catch cord of the fabric produced by the loom,-comprising-a roller supported to turn about an axis transverse to the path of movement of and to have said cord wound thereabout, and two pairs of friction disks supported on rods extending parallel to, and respectively in front and in rear of the axis of said roller, the cord be ing adapted to pass between the members of both pairs of disks.

3. The combination with a loom, of a tension means for the catch cords of the fabric produced by the loom, comprising a support adapted to be adjustabl-y mounted.

on the loom frame, and two sets of friction devices arranged on opposite sides of said support and each adapted to coiiperate with one of the catch cords as said cord is drawn into the loom.

4. The combination with a loom, of means for imparting tension to catch cords prior to their being incorporated in the fabric produced by the loom, flexible take-up devices adapted to engage said cords between said tension means and the guide roll of the loom, and means for limiting movement of said devices away from the guide roll.

5. The combination with a loom, of a support adapted to be adjustably mounted on the loom frame, and provided adjacent one end with means for holding a spool, on

Which a catch: cord is Wound, and, inadi- Vance thereof, with means for imparting tension to the cord Withdrawn from such: spool;

6. The herein: described attachment for a elongated body member mounted. on the;

frameof the 100m and provided with. alaterally deflected portion at one end, two sets of: tensioning means. supported; by the body and extending laterally from opposite sides thereof, means for supporting a plurality of spools on? saidlaterally deflected! portion: of

the body so that cords Wound thereon may pass freely to oneof said sets of tensioningmeans, and an additional spool supportad justably connected with thebody so that it will cooperate: with the other tensioning means.

8. Thev combination: With a loom, of an elongated: body member mounted on the frame of: the-loom, and provided? Witha laterally deflected: portion. at one end through.

which are formed two openings-, two set'sof tensionlng means supported by" the: body and and means on the body for limiting extending laterally from: opposite sides thereof,meansf0r supporting a plurality of spools on: said laterally deflected portion of the body sothat cords wound thereon may pass freely to one means, anarm adapted to be inserted in either of the openings in the body and project laterally so that cord from a spool supported thereon will pass freely to-the other of saidsetsof tensioning" means, and means forlocking said arm to the body.

9; In combination, aloom having a frame, a bracket adjustable longitudinally of said frame, a block adjustable vertically of said bracket, an arm removably carried by said block, a tensioning device", and means for adiustably' mounting" said tensioning device upon said arm.

10; Incombination, a 100m having a frameprovided with a; horizontally extending slot, a bracket, means extending through said slot and bracket for securing the bracket in adjusted position, a block having a vertical slot, means extending through the slot and bracket for securing said block inad'- j ust'ed vertical position, an arm removably carried by said: block, a tensioning device having spindles and tensioning means a bracket carried by said tensioning devlce, and means-for locking said bracket in adjusted position upon said arm.

In testimony whereof I have hereunto set in hand".

y ANDREW SOCCIO;

' copiestot this patent maybeiobtainewton five: cents eaehghy addressing: the Commissioner of Patents,

, wnlhinatomtmczfl" of said sets of tensioning. 

